Some notes that this writer takes advantage of the fact that MPEG1/2 is designed so that you can literally concatenate files together to combine movies. Technically each frame is its own movie (until p-frames are implemented, then a set of frames would be its own movie).

Some video players mess up here and don't decode correctly, but MPlayer, SMPlayer, FFMpeg and others work correctly. So this is great as a quick intermediate format!